The creepy-ass tarry-eyed mass-murderer girl from Heroes turns out to have a science-fiction pedigree. Dania Ramirez played Callisto in X-Men 3. AND she was a potential slayer who flirted with Xander in the final few episodes of Buffy. Ramirez says those roles helped prepare her for all the physical action involving Maya, who's trying to sneak into the U.S. with her twin brother. But otherwise, the super-powered chick roles have nothing in common, she insists. Minor spoiler:

Apparently Maya (and brother Alejandro, probably) will soon be meeting up with the other serial killer on Heroes: Sylar, better known as the Unibrow bomber.